数字林业中异构数据库的解决方案研究

本文介绍了数字林业系统的组成部分和数字林业的重要作用，讨论了数字林业中异构数据库的特点，提出了以XML文档作为转换工具的异构数据库共享的方案，以及利用Delphi管理XML文档的方法。     

基于PB的复烤烟箱打包信息系统的实现

结合云南某复烤厂烟箱打包工段装箱烟叶信息管理系统开发过程，介绍一种利用PowerBuilder数据库应用程序开发平台和Dream Weaver 网页制作平台联合开发C/S和B/S相结合的信息管理系统。整个系统的主要数据都由电脑自动采集完成，所有装箱烟叶的工艺参数都在数据库中存档备案，并且进行条码管理，为烟叶出厂后的质量追踪提供可靠的依据，使液压打包工段的自动化程度得到大幅度的提升。     

1:20万HaiSOTER数据库在海南岛的研究与应用

HaiSOTER是全球范围内第一个1:20万尺度的完整区域SOTER数据库,也是在国际土壤参 比与信息中心直接参与下由中国建立的第一个具有规范方法和多种应用模型的数据库。通过介绍 HaiSOTER数据库设计与实现过程,以及HmSOTER数据库在海南岛土壤质量系统评价、热带作物适 宜性评价、全岛土壤侵蚀危险性评价和土壤多样性理论研究中的成功应用,进一步说明了建立大、中 比例尺的SOTER数据库系统在中国具有十分广阔的前景和强大的生命力。     

数据库及应用课程教学探讨

论述了开设数据库及其应用课程的背景与必要性,结合作者的教学实践,从教学模式、教学手段、教学目标管理和考核方式等方面进行了全面探讨,为农业院校相关专业的计算机基础课程教学提供新的教学思路.     

Changes in soil organic carbon in a mountainous French region, 1990–2004

This paper reports spatial and temporal changes at the regional level in soil organic carbon (SOC) using a soil-test database. A total of 23 329 SOC test values recorded between 1990 and 2004 by certified commercial laboratories and collected in a mountainous French region (Franche-Comté) were integrated in a database. Results show a strong trend in organic carbon content, mainly related to elevation. A large loss in SOC was observed over the survey period. This loss correlated with baseline SOC content with greater loss from soils with higher carbon content. This loss is likely to be due to both changes in land use from permanent grassland to cultivation and to an increase in temperature during the survey period. Our study demonstrates that past soil-test results which were not originally intended for monitoring can provide an alternative method for detecting changes in SOC.     

乡村景观资源大数据应用平台构建研究

在美丽乡村建设和数字乡村战略双重背景下，乡村景观资源的数字化集成、管理、表达与应用是实现我国乡村生态和人居环境数字化管理提升的基础工作，本研究针对乡村景观资源数据多源异构、难以集成的问题，以乡村景观资源大数据应用平台构建为主题，应用3S与多源数据融合技术，在明确乡村景观资源大数据应用平台的需求基础上，提出了乡村景观资源大数据应用平台总体功能架构，并围绕多尺度乡村景观资源数据的融合与存储、乡村景观资源分类与评价、乡村景观资源数据可视化3个平台的核心模块的构建过程进行了叙述。通过构建分布式“空间-属性一体化”乡村景观资源大数据应用平台，实现国土-区域-地方-村域多尺度多源乡村景观资源数据的集成、分类、评价与展示。     

辽宁农业多维空间监测信息系统项目可行性报告

分析了当前空间技术的发展概况，提出了辽宁省建设农业空间监测系统的必要性，重点阐述了辽宁农业空间监测系统包含的技术内容及发展路线。     

ilasII系统的维护与实践

结合ilasII2.0系统的维护实际,解析了系统在运用过程中存在的问题,并提出了解决方法。     

The implications of current and future urbanization for global protected areas and biodiversity conservation

Due to human population growth and migration, there will be nearly 2 billion new urban residents by 2030, yet the consequences of both current and future urbanization for biodiversity conservation are poorly known. Here we show that urban growth will have impacts on ecoregions, rare species, and protected areas that are localized but cumulatively significant. Currently, 29 of the world’s 825 ecoregions have over one-third of their area urbanized, and these 29 ecoregions are the only home of 213 endemic terrestrial vertebrate species. Our analyses suggest that 8% of terrestrial vertebrate species on the IUCN Red List are imperiled largely because of urban development. By 2030, 15 additional ecoregions are expected to lose more than 5% of their remaining undeveloped area, and they contain 118 vertebrate species found nowhere else. Of the 779 rare species with only one known population globally, 24 are expected to be impacted by urban growth. In addition, the distance between protected areas and cities is predicted to shrink dramatically in some regions: for example, the median distance from a protected area to a city in Eastern Asia is predicted to fall from 43 km to 23 km by 2030. Most protected areas likely to be impacted by new urban growth (88%) are in countries of low to moderate income, potentially limiting institutional capacity to adapt to new anthropogenic stresses on protected areas. In short, trends in global ecoregions, rare species, and protected areas suggest localized but significant biodiversity degradation associated with current and upcoming urbanization.     

Visiting the Methodological Aspects of Flooding Experiments: Quantitative Evidence from Agricultural and Ecophysiological Studies

Plant responses to flooding have been studied and reviewed extensively. However, the differences among the experimental procedures used to apply the flood that lead to such responses have never been explored. In this work, a database of 132 articles was created to quantify important methodological aspects of flooding experiments in crop and non-crop species for the first time as well as to look for thematic gaps in our knowledge on flooding research. Results showed that the flood experiments were conducted differently for crop and non-crop species, with two main distinctions: the duration of the flood and the consideration of competition among plants. For crop species, experimental flooding had a short duration of 16 days (ranging from 8 to 28 days for the 25th and 75th percentiles), while for non-crop species, flooding was quite longer, nearly 45 days (ranging from 28 to 61.5 days). Also, 53 % of the examined experiments in crop species considered competition among plants in their experimental protocol, while only 20 % did so for non-crop species. Regarding the topics least investigated within this area, in terms of both crop and non-crop species, future investigation should focus on the effects of flooding on reproductive traits, mineral nutrition and the nitrogen fixation of plants. These results are discussed, along with their implications in terms of defining crucial aspects of the methodology of flooding experiments.